| 摘要 |
<p>A service bed comprising a chassis, a guide mechanism movably supported by the chassis, and a mattress having an undulation formed by routing the mattress through the guide mechanism. The guide mechanism includes dispensing and collecting rollers for installing at least one first stratum between the mattress and the occupant of the service bed and for removing at least one second stratum installed between the mattress and the occupant.</p> |
